\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*}((a,b),(c,d))^-1 = 1/(ad-bc)\begin{bmatrix} 0 & \cdots & 1 \\ \vdots & \ddots & \vdots \\ 2 & \cdots & 3\end{bmatrix}d & -b \\-c & a\end{equation*}
\end{document}
